File consists of microfiches. Transcriptions of original baptismal, marriage, and burial registers of the Holy Trinity Anglican Church in Thornhill, the tenth oldest parish in the Diocese of Toronto, established in 1830. An index of all names appearing in the register transcriptions (participants, witnesses, etc.) is included.

Fonds consists microfim reels, with index to land patents by township, 1793-1852, and by district, 1793-1825; district marriage registers, 1800-1870, 1896; and county marriage registers, 1833, 1841-1934; and Roman Catholic marriage registers, New Market Mission (encompasses York Co., Toronto and Gore Tps, etc.), 1850-1870.